May weather forecast
Foster, OR

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Weather in May

May, the last month of the spring in Foster, is an enjoyable month, with an average temperature varying between 63.9°F (17.7°C) and 40.6°F (4.8°C).

Temperature

May's onset is marked by a subtle temperature increase, moving from a moderate 55.9°F (13.3°C) in April to an enjoyable 63.9°F (17.7°C). Despite considerable daily temperature swings, a steady low-temperature average of 40.6°F (4.8°C) is noted in Foster throughout May.

Humidity

In May, the average relative humidity is 78%.

Rainfall

In Foster, Oregon, in May, during 13.8 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. In Foster, Oregon, during the entire year, the rain falls for 167.6 days and collects up to 36.54" (928mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In May, the average length of the day is 14h and 49min.
On the first day of the month, sunrise is at 5:59 am and sunset at 8:15 pm. On the last day of May, in Foster, Oregon, sunrise is at 5:29 am and sunset at 8:47 pm PDT.

Sunshine

In May, the average sunshine in Foster is 8.3h.

UV index

In Foster, Oregon, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: A daily maximum UV index of 4 in May translates into the following instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
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Frequently asked questions

What is the average May temperature in Foster?

An average high-temperature, in May, in Foster, is 63.9°F (17.7°C) and the average low-temperature is 40.6°F (4.8°C).

What is the average humidity in May in Foster?

The average relative humidity in May in Foster is 78%.

How much does it rain in Foster in May?

In Foster, in May, during 13.8 rainfall days, 2.17" (55mm) of precipitation is typically accumulated.

When it does not snow in Foster?

In Foster, snow does not fall in May through October.

Does it snow in Foster in May?

In May, in Foster, it doesn't snow. April is the latest month when it typically snows.

What is the average length of the day in May in Foster?

The average day length in May in Foster is 14h and 49min.

What time are sunrise and sunset in May in Foster?

In May, on the first day of the month, sunrise is at 5:59 am and sunset at 8:15 pm. On the last day of the month, in Foster, Oregon, sunrise is at 5:29 am and sunset at 8:47 pm PDT.

How many hours of sunshine does Foster have in May?

The average sunshine duration in May in Foster, Oregon, is 8.3h.

What is the UV index reading in May in Foster?

The average daily maximum UV index in May in Foster is 4. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Foster, OR

Average temperature in May - Foster, OR
  • Average high temperature in May: 63.9°F

The warmest month (with the highest average high temperature) is August (79.5°F).
The month with the lowest average high temperature is December (44.4°F).

  • Average low temperature in May: 40.6°F

The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).

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Average pressure in May
Foster, OR

Average pressure in May - Foster, OR
  • Average pressure in May: 30.03"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

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Average wind speed in May
Foster, OR

Average wind speed in May - Foster, OR
  • Average wind speed in May: 4.1mph

The windiest month (with the highest average wind speed) is January (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

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Average humidity in May
Foster, OR

Average humidity in May - Foster, OR
  • Average humidity in May: 78%

The months with the highest relative humidity are February, March and December (86%).
The month with the lowest relative humidity is August (66%).

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Average rainfall in May
Foster, OR

Average rainfall in May - Foster, OR
  • Average rainfall in May: 2.17"

The wettest month (with the highest rainfall) is December (5.47").
The driest month (with the least rainfall) is July (0.24").

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Average rainfall days in May
Foster, OR

Average rainfall days in May - Foster, OR
  • Average rainfall days in May: 13.8 days

The month with the highest number of rainy days is March (21.1 days).
The month with the least rainy days is July (4.1 days).

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Average snowfall in May
Foster, OR

Average snowfall in May - Foster, OR
  • Average snowfall in May: 0"

The month with the highest snowfall is February (3.7").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in May
Foster, OR

Average snowfall days in May - Foster, OR
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in May /
Average sunshine in May
Foster, OR

Average daylight in May / Average sunshine in May - Foster, OR
  • Average daylight in May: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in May: 8h and 2min

The month with the most sunshine is August (Average sunshine: 11h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).

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Average sunshine days in May
Foster, OR

Average sunshine days in May - Foster, OR
  • Average sunshine days in May: 15.6 days

The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is February (8.4 days).

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Average UV index in May
Foster, OR

Average UV index in May - Foster, OR
  • Average UV index in May: 4

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 1).

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Average cloud cover in May
Foster, OR

Average cloud cover in May - Foster, OR
  • Average cloud cover in May: 49

The months with the most cloud cover are February and March (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 19).

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Average visibility in May
Foster, OR

Average visibility in May - Foster, OR
  • Average visibility in May: 5mi

The month with the highest visibility is August (6mi).
The months with the lowest visibility are February and April (4mi).

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Foster, Oregon, USA

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